49853781209 has 2 divisors, whose sum is σ = 49853781210. Its totient is φ = 49853781208.

The previous prime is 49853781149. The next prime is 49853781217. The reversal of 49853781209 is 90218735894.

49853781209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49607761984 + 246019225 = 222728^2 + 15685^2 .

It is a cyclic number.

It is not a de Polignac number, because 49853781209 - 2⁸ = 49853780953 is a prime.

It is not a weakly prime, because it can be changed into another prime (49853784209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24926890604 + 24926890605.

It is an arithmetic number, because the mean of its divisors is an integer number (24926890605).

Almost surely, 2^49853781209 is an apocalyptic number.

It is an amenable number.

49853781209 is a deficient number, since it is larger than the sum of its proper divisors (1).

49853781209 is an equidigital number, since it uses as much as digits as its factorization.

49853781209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 49853781209 in words is "forty-nine billion, eight hundred fifty-three million, seven hundred eighty-one thousand, two hundred nine".